pp. 2005-2011
S&M4037 Research Paper of Special Issue https://doi.org/10.18494/SAM5613 Published: May 23, 2025 Feasibility Study of Thallium Bromide Detectors for Boron Neutron Capture Therapy Applications [PDF] Keitaro Hitomi, Mitsuhiro Nogami, Kenichi Watanabe, Nishiki Matsubayashi, and Hiroki Tanaka (Received February 28, 2025; Accepted April 23, 202) Keywords: thallium bromide (TlBr), boron neutron capture therapy (BNCT), gamma-ray detector, compound semiconductor, prompt gamma ray detection
A thallium bromide (TlBr) detector with four-channel readout electrodes was fabricated from a crystal grown by the traveling molten zone method from a zone-purified material for boron neutron capture therapy applications. The detector crystal dimensions were 12 × 12 × 10 mm3. The detector had four circular anodes of 2 mm diameter. The detector exhibited energy resolutions sufficient to resolve 478 keV gamma rays from 511 keV gamma rays. A prompt gamma-ray detection system was constructed using the TlBr detector and a tungsten collimator. A mouse phantom with a tumor sphere containing 1475 ppm 10B was irradiated with thermal neutrons. The 10B distribution was imaged successfully with the TlBr detector system. The detector system exhibited a linear relationship between the counts for 478 keV and the 10B concentration in the range of 0–5000 ppm.
Corresponding author: Keitaro Hitomi![]() ![]() This work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Keitaro Hitomi, Mitsuhiro Nogami, Kenichi Watanabe, Nishiki Matsubayashi, and Hiroki Tanaka, Feasibility Study of Thallium Bromide Detectors for Boron Neutron Capture Therapy Applications, Sens. Mater., Vol. 37, No. 5, 2025, p. 2005-2011. |